完全用VB進行ASM編程的示例

只看該作者 · 發(fā)表于 2008-9-28 16:21:50

下面的例子完全用VB進行ASM編程的示例，本例獲得CPU ID.
 
工程文件分為一個form1.frm 和一個模塊module1.bas
 
----------------------form1.frm的源文件---------------------
 
VERSION 5.00
Begin VB.form form1 
  Caption         =   "form1"
  ClientHeight    =   1965
  ClientLeft      =   60
  ClientTop       =   345
  ClientWidth     =   3105
  LinkTopic       =   "form1"
  ScaleHeight     =   1965
  ScaleWidth      =   3105
  StartUpPosition =   2  'Bildschirmmitte
  Begin VB.CommandButton Command1 
     Caption         =   "Get CPU Name"
     Height          =   495
     Left            =   840
     TabIndex        =   0
     Top             =   315
     Width           =   1425
  End
  Begin VB.Label Label2 
     Alignment       =   2  'Zentriert
     AutoSize        =   -1  'True
     BeginProperty Font 
        Name            =   "MS Sans Serif"
        Size            =   9.75
        Charset         =   0
        Weight          =   400
        Underline       =   0   'False
        Italic          =   0   'False
        Strikethrough   =   0   'False
     EndProperty
     Height          =   240
     Left            =   1515
     TabIndex        =   2
     Top             =   1065
     Width           =   60
  End
  Begin VB.Label Label1 
     Alignment       =   2  'Zentriert
     AutoSize        =   -1  'True
     BeginProperty Font 
        Name            =   "Arial"
        Size            =   12
        Charset         =   0
        Weight          =   700
        Underline       =   0   'False
        Italic          =   0   'False
        Strikethrough   =   0   'False
     EndProperty
     Height          =   285
     Left            =   1515
     TabIndex        =   1
     Top             =   1350
     Width           =   75
  End
End
Attribute VB_Name = "form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
 
Private Sub Command1_MouseDown(Button As Integer, Shift As Integer, x As Single, Y As Single)
 
   Label1 = ""
   Label2 = ""
 
End Sub
 
Private Sub Command1_Click()
   
   Label1 = GetCpuName() & " CPU"
   Label2 = "You have a" & IIf(InStr("AEIOU", Left$(Label1, 1)), "n", "")
 
End Sub
------------------------------end---------------------------------
 
 
 
下面是modu1e.bas的源代碼
 
----------------------module1.bas的源文件--------------------------
Option Explicit
'
'This shows how to incorporate machine code into VB
'''''''''''''''''''''''''''''''''''''''''''''''''''
'The example fills the array with a few machine instructions and then copies
'them to a procedure address. The modified procedure is then called thru
'CallWindowProc. The result of this specific machine code is your CPU Vendor Name.
'
'##########################################################################
'Apparently it gets a Stack Pointer Error, but I don't know why; if anybody
'can fix that please let me know...                          UMGEDV@AOL.COM
'The Error is not present in the native compiled version; so I think it got
'something to do with the P-Code Calling Convention (strange though)...
'##########################################################################
'
'Sub Dummy serves to reserve some space to copy the machine instructions into.
'
'
'Tested on Intel and AMD CPU's (uncompiled and compiled)
'
'
Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (lpvDest As Any, lpvSource As Any, ByVal cbCopy As Long)
Private x As Long
 
Public Function GetCpuName() As String
 
 Dim MachineCode(0 To 35)  As Byte
 Dim VarAddr               As Long
 Dim FunctAddr             As Long
 Dim EAX                   As Long
 Dim CPUName(1 To 12)      As Byte
 
 'set up machine code
   
   MachineCode(0) = &H55    'push ebp
   
   MachineCode(1) = &H8B    'move ebp,esp
   MachineCode(2) = &HEC
   
   MachineCode(3) = &H57    'push edi
   
   MachineCode(4) = &H52    'push edx
   
   MachineCode(5) = &H51    'push ecx
   
   MachineCode(6) = &H53    'push ebx
   
   MachineCode(7) = &H8B    'move eax,dword ptr [ebp+8]
   MachineCode(8) = &H45
   MachineCode(9) = &H8
   
   MachineCode(10) = &HF    'cpuid
   MachineCode(11) = &HA2
   
   MachineCode(12) = &H8B   'mov edi,dword ptr [ebp+12]
   MachineCode(13) = &H7D
   MachineCode(14) = &HC
   
   MachineCode(15) = &H89   'move dword ptr [edi],ebx
   MachineCode(16) = &H1F
   
   MachineCode(17) = &H8B   'mov edi,dword ptr [ebp+16]
   MachineCode(18) = &H7D
   MachineCode(19) = &H10
   
   MachineCode(20) = &H89   'move dword ptr [edi],ecx
   MachineCode(21) = &HF
   
   MachineCode(22) = &H8B   'mov edi,dword ptr [ebp+20]
   MachineCode(23) = &H7D
   MachineCode(24) = &H14
   
   MachineCode(25) = &H89   'move dword ptr [edi],edx
   MachineCode(26) = &H17
   
   MachineCode(27) = &H58   'pop ebx
 
   MachineCode(28) = &H59   'pop ecx
 
   MachineCode(29) = &H5A   'pop edx
 
   MachineCode(30) = &H55   'pop edi
   
   MachineCode(31) = &HC9   'leave
 
   MachineCode(32) = &HC2   'ret 16     I tried everything from 0 to 24
   MachineCode(33) = &H10   '           but all produce the stack error
   MachineCode(34) = &H0
   
   'tell cpuid what we want
   EAX = 0
   
   'get address of Machine Code
   VarAddr = VarPtr(MachineCode(0))
   
   'get address of Sub Dummy
   FunctAddr = GetAddress(AddressOf Dummy)
   
   'copy the Machine Code to where it can be called
   CopyMemory ByVal FunctAddr, ByVal VarAddr, 35 '35 bytes machine code
   
   'call it
   On Error Resume Next 'apparently it gets a stack pointer error when in P-Code but i dont know why
     CallWindowProc FunctAddr, EAX, VarPtr(CPUName(1)), VarPtr(CPUName(9)), VarPtr(CPUName(5))
     'Debug.Print Err; Err.Description
     'MsgBox Err & Err.Description
   On Error GoTo 0
   
   GetCpuName = StrConv(CPUName(), vbUnicode) 'UnicodeName
   
End Function
 
Private Function GetAddress(Address As Long) As Long
 
   GetAddress = Address
 
End Function
 
Private Sub Dummy()
 
 'the code below just reserves some space to copy the machine code into
 'it is never executed
 
   x = 0
   x = 1
   x = 2
   x = 3
   x = 4
   x = 5
   x = 6
   x = 7
   x = 8
   x = 9
   x = 10
   x = 0
   x = 1
   x = 2
   x = 3
   x = 4
   x = 5
   x = 6
   x = 7
   x = 8
   x = 9
   x = 10
  
End Sub

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完全用VB進行ASM編程的示例